Chain-saw attachment.



R. L. MUIR.

CHAIN SAW ATTACHMENT. APPLIUATION FILED APR.1,19oa.

Patented Mar. 8, 1910.

2 SHEETS-SHEET 1.

R. L. MUIR.

CHAIN SAW ATTACHMENT. ArPLIoATIoN FILED APR.16,1908.

Patented Mar. 8, 19110.

2 SHEETS-SHEET 2.

nare..

@poolen of Lettera Patent.

l Finca.

Nm, CLIFOE'NIA.

Application filed April 16, 1968. Serial No. 427,521.

To all whom 'it may con/cera:

Be it known that l, REGINALD L. Mmm, citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements lin Chain-Saw Attachments, of which the following is a specification.

My invention relates to improvements in that class of saws, in which the cutting teeth are connected together to form an endless flexible chain which is carried over sprockets through which power .is transmitted to drive the .chain of teeth.

It consists in the combination of arts,.and in details of mechanism which williy be more fully explained by reference to the accompanying drawings, in which- Figure 1 is a side elevation. Figs. 2, 3, 4 and 5 are details of the saw. Fig. 6 is a plan. Fig. 7 is a section.; and Fim '8 is a face view of the channel disks. Fig- 9 is a plan of the handling device.

My present invention is an improvement upon an apparatus patented by me `Slept. 3, 1907 No. B65/118; and its .object is to .rovide certain details by which I simplify tie construction, enlarge the sco' le of movement, provide a better vmeans or handling the mechanism and changing its position and improvements in the saw, and the connections therewith.

A is a distance piece having journaled at either end the sprocket-wheels 2 and 3, around which sprocket-Wheels an endless saw is adapted to travel. These sprocketwheels are channeled or formed with grooves, with which the driving spurs 8 of the sawteeth-engage and thus serve to guide the saw and maintain it in its proper line of travel. flhe outermost idler s rocket is preferably journaled in a yoke e Xed to .the outer end of the distance-piece A, and the sides of the yoke are slotted so that the shaft oit the s rocket-wheel may ipass through the slots..

he ends ot the sha are turnable in 'bearings in the ends of the adjusting rods 5, and these rods are movable so as to regulate and maintain the tension of the chain saw.

5a are tension springs upon the `take up rods 5, and by turning the nuts with. relation to the yoke which carries the shaftI bearings, I provide` for a reater or less tension upon the saw, and suli'ig pensate for varying strains.

'Ehe saw is formed of links 7 pivoted to- .,ther as shown in Fig. 2, and the ends of cient yielding to comthese links are odset to opposite sides of the central toothed lortion, and are ivoted together so that t e main partel o the links which carry the teeth and uide lates or lugs, will travel substantialy in ine with each other.` In the presenty case l have shown spurs or lugs 8 projecting from the lnner edges of the link plates, and the toothed portion or portions 9 project on the opposite side ot'the links. These teeth may be formed in any-usual or suitable manner, either double and having a channel extendin between them down to approximately a ine with the upper edge of the link and having the points set in opposite directions to form a kerf, 0r the tooth body may be made single, as shown at 9, and it is formed with points 9b diverging in the line of travel of the saw, and these points are set or spread to provide for the kerf. The backs `or interior edges of these teeth thus formed are curved. inwardly, and these lines of curvature meet about the center of the vertical line of the body 9a. By constructing the saw in this manner, the alternate teeth have the cutting bits 9b diverging forward and backward. The forward bits produce the cut, While .the rear points follov7 in the cut formed by the forward ones, and by their contact with the bottom of the cut, they form guides to prevent the gouging of the forward tooth points 9, and they thus make the work more regular, and the strain upon t-he sa'vv less jerky and uneven. Another yadvantage of these double points is that if by any reason the saw should become pinched by a partial closing of the kerf after the saw .is wholly within the log, it will be seen that the upper part of the saw returning over the top of the sprockets, will carry the points in the opposite direction from the cutting movement below, and these teeth serve .to lcut their way out of the saw kertf in the reverse movement so that the saw ma;r be lifted from the log.

rlhe rearl or driving sprocket around which the saw passes, is journaled in a yoke or frame 10 which extends down upon each side of the sprocket, and is supported upon the power shaft 11 which drives the sprocket. This shaft is journaled in a frame l2, and it carries a gear-Wheel 13. This gear-Wheel is iixed to the back of one member of the friction clutch 14, so that the two parts turn together, and by any usual or Well known clutch mechanism and actuating lever, the

Patented Mar. 8, 1910.

other [part of the clutch may be engaged so that the drivingsha-ft will be rotated, or by throwing the clutch out, it will remain stationary.

The bevel-gear meshes with a pinion 15 upon the motor-shaft 16 throu h which power is transmitted. The sha t extends through au opening in the frame 12, and by means of circular channeled disks 25 that portion of the frame carried by the saw and its shaft, may be revolved entirely around the axis so that the saw can be made to cut horizontally, vertically, or at any angle between the two. The frame `12 is made of channel or angle iron, to each end of which the bracket bearings'for the shaft 11, are bolted. The frame is slotted as shown in Fig. 8.

The center bracket forms a bearing with a long foot, and is bolted to the face-plate l2 ofthe disk 25, through the slot in the frame 12. The frame 12, the central bracket bearing and the disk 25 are united together by countersunk headed bolts 26 which pass through and are slidable in concentric slots in the disk 25, and when these bolts are loosened, the `whole of the saw support may be turned entirely around as previously stated. The concentric slots or chanlnels in-the disk 25, are formed by bolting concentric rings to a plate on the main frame. These rings are of such diameters that a space or channel is formed 4between the" outer periphery of one ring, and the inner surface of the other. The distancepiece A is formed of parallel plates, and these have spacing-blocks a riveted between thus forming a stil construction.

In order to conveniently raise andlower the forward end of the saw, turning about the rear driving shaft, I have provided a frame 17 having a projecting boom or jlb, which carries a pulley 19 at its outer end. A wire rope 30 is secured to the bar 2O from which the outer sprocket is supported, thence passing around the direction pulleys, is led to a winding drum or shaft 21, Where by means of a crank or equivalent operating device 22, a single operator may raise the saw out of the cut or depress it to its work.

After a cut has been completed, the saw may be raised out of the cut, and the main carrying frame 12a may be moved trans-- versely to any desired distance, being mounted upon a sled or support so that when clear of the log, the whole .p aratus may be moved transversely and suciently to place the saw in position for a new cut. This movement may be effected by means of a revoluble screw shaft 28 journaled tothe su port 29, and the threaded portion turnab e in nuts upon the movable frame, so that it may be moved along the main frame to bring the saw into position for a new cut. The main movement may be effected by means of horses or other power; andthe above described movement serves for the more exact adjustment to the mark for the new cut.

The lead of the ropes 30 is more plainly shown in Fig. 9 in which the outer ropes diverge from the transverse bar 20 to the )alleys on the ends of the longer transverse ar 31, thence returning to a shortertransverse bar 32, over pulleys thereon, and thence in parallel lines to the winding drum 21. The inner ropes 30 are attached to the bar 20 bet-Ween the outer ropes 30 and the center of the bar,and cross each other to the pulleys 19 on the bar 31, thence returning over pulleys on the bar 32 and leading parallel to the winding drum. This disposltion of the ropes acts to brace the outer transverse bars, preventing them from swaying when the saw is lifted, and insuring a substantially straight Vertical movement of the saw frame as it is raised or lowered.

Having thus described my invention, what I claim and desire to secure by Letters Patent isy 1. A chain sawing apparatus having in combination a distance piece, sprocket wheels at o posite ends thereof, an endless flexible cham saw passing around said sprocket wheels, means for operating the chain, and means for raising and lowering the distance piece and its chain, said means comprising a stationary boom or jib, a winding drum on said frame, direction pulleys on the boom, ropes passing from said drum over said ulleys and having their free end connected to the outer end of the distance piece, and a turn table connection between the inner end yof the distance piece vand said frame, said turn table permitting the saw to cut horizontally, vertically or at an angle between the horizontal and vertical.

2. A chain sawing apparatus having in combination a main frame, a frame secured thereto, a shaft mounted in the outer end of the second frame, an endless traveling chain saw having its inner end hung upon said shaft, a shaft extending transversely through the main frame and second-named frame, driving connections between the two shafts for operating the chain saw, a turn table connection between said frames, said connection comprising concentric rings provided with channels, and securing bolts engagin the channels whereby the saw may be turne about the transverse shaft as an axis and be made to operate either horizontally or vertically or at an angle between the horizontal and vertical.

3. In a sawing apparatus of the character described, an endless chain saw, a distancepiece, sprockets journaled at each end of said distance-piece, a drivin shaft to which the inner s rocket is fixe a gear wheel on said sha t, a pinion engaging the gearwheel, a pinion shaft extending at right grooved angles and connecting 4with the motor, a frame upon which the said shafts are journaled, said frame having channels concentric with the pinion shaft, and locking bolts and nuts whereb the saw-carrying frame may be turned a out the power shaft and locked at any desired position.

4. In a chain sawing apparatus of the character described, an endless chain s aw, grooved sprocket-wheels, a channeled' direction plate at the ends of which the sprocketwheels are journaled, a driving-shaft to which the inner sprocket-wheel 1s fixed, a frame upon which said shaft is journaled, means for transmitting power thereto, and means for raising and lowering lthe saw, said means comprlsing a boom or jib mounted upon the main frame, direction pulleys and a winding drum mounted with relation thereto, wire ropes passing around the drum and pulleys, a yoke connected with the outer end of the distance piece and the outer sprocket pulley, the winding ropes having their outer ends connected with said'yoke.

5. A chain sawing apparatus comprising a main frame and a.booIn or jibmounted thereon,l a chain saw and means 'hingedly securin its inner end to said frame, a cross bar at t e youter end of said saw, a cross bar at the outer end of the jib or boom and a bar extendin across the intermediate portion of the oom, pulleys on said second and third bars, a winding drum on the main frame, hoisting ropes having one end connected to the cross bar at the outer end of the chain saw thence extending around the guide pulleys on the bars at the outer and intermediate portion of the boom or jib to4 said drum, other hoisting ropes having one end connected to the boom at the outer end of the chain saw, said ropes crossing each other and extending around the pulleys on the bars at the outer and intermediate portions of the jib or boom and connected to said 'winding drum, whereby the saw may be raised and depressed, and held against side swaying movement.

' 6. In an apparatus of the character described; an endless chain saw, a frame with sprockets at either end around which the saw is caused to travel, a power transmit ting shaft upon which the inner sprocket is mounted, a jib or derrick projecting above the outer end of the saw, transverse bars having direction pulleys thereon, a winding drum, hoisting ropes extending therefrom, direction pulleys over which the ropes pass, said ropes extending diagonally from the inner to the outer transverse frame, and forming braces to prevent side swaying movement.

In testimony whereof l have hereunto set my hand in presence of two subscribing witnesses.

REGINALD L. MUR. Witnesses:

Guo'. H. S'rnone, CHARLES EDELMAN. 

